Application of air ions for bacterial de-colonization in air filters contaminated by aerosolized bacteria

Yang Seon Kim; Ki Young Yoon; Jae Hong Park; Jungho Hwang

doi:10.1016/j.scitotenv.2010.11.012

Application of air ions for bacterial de-colonization in air filters contaminated by aerosolized bacteria

Yang Seon Kim, Ki Young Yoon, Jae Hong Park, Jungho Hwang

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

We aerosolized the Escherichia coli (E. coli) and Staphylococcus epidermidis (S. epidermidis) bacteria and collected them on membrane filters. Then we generated air ions by applying a high voltage to a carbon fiber tip and applied them to the contaminated filters. The antibacterial efficiency was not significantly affected by the bacteria being Gram-positive or Gram-negative, however, negative ions showed a lower antibacterial efficiency than positive ions to both E. coli and S. epidermidis, even though the concentration of negative air ions was much higher than that of positive air ions. With a field emission scanning electron microscope (FE-SEM) images and fluorescence microscopy images using a LIVE/DEAD BacLight Bacterial Viability Kit, electrostatic disruption of the bacteria was found to be the dominant antibacterial effect.

Original language	English
Pages (from-to)	748-755
Number of pages	8
Journal	Science of the Total Environment
Volume	409
Issue number	4
DOIs	https://doi.org/10.1016/j.scitotenv.2010.11.012
Publication status	Published - 2011 Jan 15

Bibliographical note

Funding Information:
This research was supported by the Converging Research Headquarter for HCE Program funded by the Ministry of Education, Science and Technology (2010K001143).

All Science Journal Classification (ASJC) codes

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution

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Cite this

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title = "Application of air ions for bacterial de-colonization in air filters contaminated by aerosolized bacteria",

abstract = "We aerosolized the Escherichia coli (E. coli) and Staphylococcus epidermidis (S. epidermidis) bacteria and collected them on membrane filters. Then we generated air ions by applying a high voltage to a carbon fiber tip and applied them to the contaminated filters. The antibacterial efficiency was not significantly affected by the bacteria being Gram-positive or Gram-negative, however, negative ions showed a lower antibacterial efficiency than positive ions to both E. coli and S. epidermidis, even though the concentration of negative air ions was much higher than that of positive air ions. With a field emission scanning electron microscope (FE-SEM) images and fluorescence microscopy images using a LIVE/DEAD BacLight Bacterial Viability Kit, electrostatic disruption of the bacteria was found to be the dominant antibacterial effect.",

author = "Kim, {Yang Seon} and Yoon, {Ki Young} and Park, {Jae Hong} and Jungho Hwang",

note = "Funding Information: This research was supported by the Converging Research Headquarter for HCE Program funded by the Ministry of Education, Science and Technology (2010K001143).",

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